It’s currently not possible to have multiple instances of task watchdogs. The timer ISR is never actually called during normal operation, as the timer is The task watchdog uses a kernel timer as its backend. Watchdog itself or the scheduler has a malfunction. To supervise multiple threads or tasks (called watchdog channels).Īn existing hardware watchdog can be used as an optional fallback if the task This software watchdog based on kernel timers provides a method Single watchdog instance may not be sufficient anymore, as it can be used for In real-time operating systems with multiple tasks running in parallel, a

Triggered to bring the system back to normal operation. If the software got stuckĪnd does not manage to feed the watchdog anymore, the corrective action is

In regular intervals to prevent it from timing out.

Once initialized, the watchdog timer has to be restarted (“fed”) Is to trigger an action (usually a system reset) in case of severe software Many microcontrollers feature a hardware watchdog timer peripheral.